Product Description Product DeascriptionSpecificationBrandCSZBTRModdel NoNRV090Other ModelsOld Model New Model Ratio Center Distance PowerRV571 7.5~100 25mm 0.06KW~0.12KW RV030RW0307.5~10030mm 0.06KW~0.25KWRV040RW0407.5~10040mm 0.09KW~0.55KWRV050RW0507.5~10050mm 0.12KW~1.5KWRV063RW0637.5~10063mm 0.18KW~2.2KWRV075RW0757.5~10075mm 0.25KW~4.0KWRV090RW0907.5~10090mm …